Resistance testing device 100 µs, ± 25 A | TDR900

automaticcircuit breaker

Performs timing for up to 4 breaks per phase w/motion measurements for any circuit breaker The Doble TDR900 is your entry-level, portable circuit breaker test set. It operates and records a circuit breaker’s contact timing, motion, velocity, main contact engagement & synchronization, trip and close coil initiation and currents. Use the TDR900 to verify control circuit, check motion of moving parts, validate time of operation and demonstrate results of circuit breaker maintenance. • Monitor breakers with up to 4 breaks per phase with motion measurements • Detect main and pre-insertion resistor engagement and timing on all 12 channels • Record up to three analog and three digital customer definable parameters • Create and manage custom circuit breaker test plans with T-Doble software • Measure additional parameters in the mechanism cabinet using Doble or 3rd party transducers • Know that your breakers can and will perform when they are needed • Easily detect main contact and resistor contact timing errors • Control with a Doble Universal Controller (DUC), tablet or PC